1*b3b42b4aSSven Van Asbroeck // SPDX-License-Identifier: GPL-2.0-only
2*b3b42b4aSSven Van Asbroeck /*
3*b3b42b4aSSven Van Asbroeck * Copyright (C) 2019 Sven Van Asbroeck
4*b3b42b4aSSven Van Asbroeck */
5*b3b42b4aSSven Van Asbroeck
6*b3b42b4aSSven Van Asbroeck #include <linux/leds.h>
7*b3b42b4aSSven Van Asbroeck #include <linux/module.h>
8*b3b42b4aSSven Van Asbroeck #include <linux/platform_device.h>
9*b3b42b4aSSven Van Asbroeck #include <linux/mfd/tps6105x.h>
10*b3b42b4aSSven Van Asbroeck #include <linux/regmap.h>
11*b3b42b4aSSven Van Asbroeck
12*b3b42b4aSSven Van Asbroeck struct tps6105x_priv {
13*b3b42b4aSSven Van Asbroeck struct regmap *regmap;
14*b3b42b4aSSven Van Asbroeck struct led_classdev cdev;
15*b3b42b4aSSven Van Asbroeck struct fwnode_handle *fwnode;
16*b3b42b4aSSven Van Asbroeck };
17*b3b42b4aSSven Van Asbroeck
tps6105x_handle_put(void * data)18*b3b42b4aSSven Van Asbroeck static void tps6105x_handle_put(void *data)
19*b3b42b4aSSven Van Asbroeck {
20*b3b42b4aSSven Van Asbroeck struct tps6105x_priv *priv = data;
21*b3b42b4aSSven Van Asbroeck
22*b3b42b4aSSven Van Asbroeck fwnode_handle_put(priv->fwnode);
23*b3b42b4aSSven Van Asbroeck }
24*b3b42b4aSSven Van Asbroeck
tps6105x_brightness_set(struct led_classdev * cdev,enum led_brightness brightness)25*b3b42b4aSSven Van Asbroeck static int tps6105x_brightness_set(struct led_classdev *cdev,
26*b3b42b4aSSven Van Asbroeck enum led_brightness brightness)
27*b3b42b4aSSven Van Asbroeck {
28*b3b42b4aSSven Van Asbroeck struct tps6105x_priv *priv = container_of(cdev, struct tps6105x_priv,
29*b3b42b4aSSven Van Asbroeck cdev);
30*b3b42b4aSSven Van Asbroeck
31*b3b42b4aSSven Van Asbroeck return regmap_update_bits(priv->regmap, TPS6105X_REG_0,
32*b3b42b4aSSven Van Asbroeck TPS6105X_REG0_TORCHC_MASK,
33*b3b42b4aSSven Van Asbroeck brightness << TPS6105X_REG0_TORCHC_SHIFT);
34*b3b42b4aSSven Van Asbroeck }
35*b3b42b4aSSven Van Asbroeck
tps6105x_led_probe(struct platform_device * pdev)36*b3b42b4aSSven Van Asbroeck static int tps6105x_led_probe(struct platform_device *pdev)
37*b3b42b4aSSven Van Asbroeck {
38*b3b42b4aSSven Van Asbroeck struct tps6105x *tps6105x = dev_get_platdata(&pdev->dev);
39*b3b42b4aSSven Van Asbroeck struct tps6105x_platform_data *pdata = tps6105x->pdata;
40*b3b42b4aSSven Van Asbroeck struct led_init_data init_data = { };
41*b3b42b4aSSven Van Asbroeck struct tps6105x_priv *priv;
42*b3b42b4aSSven Van Asbroeck int ret;
43*b3b42b4aSSven Van Asbroeck
44*b3b42b4aSSven Van Asbroeck /* This instance is not set for torch mode so bail out */
45*b3b42b4aSSven Van Asbroeck if (pdata->mode != TPS6105X_MODE_TORCH) {
46*b3b42b4aSSven Van Asbroeck dev_info(&pdev->dev,
47*b3b42b4aSSven Van Asbroeck "chip not in torch mode, exit probe");
48*b3b42b4aSSven Van Asbroeck return -EINVAL;
49*b3b42b4aSSven Van Asbroeck }
50*b3b42b4aSSven Van Asbroeck
51*b3b42b4aSSven Van Asbroeck priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
52*b3b42b4aSSven Van Asbroeck if (!priv)
53*b3b42b4aSSven Van Asbroeck return -ENOMEM;
54*b3b42b4aSSven Van Asbroeck /* fwnode/devicetree is optional. NULL is allowed for priv->fwnode */
55*b3b42b4aSSven Van Asbroeck priv->fwnode = device_get_next_child_node(pdev->dev.parent, NULL);
56*b3b42b4aSSven Van Asbroeck ret = devm_add_action_or_reset(&pdev->dev, tps6105x_handle_put, priv);
57*b3b42b4aSSven Van Asbroeck if (ret)
58*b3b42b4aSSven Van Asbroeck return ret;
59*b3b42b4aSSven Van Asbroeck priv->regmap = tps6105x->regmap;
60*b3b42b4aSSven Van Asbroeck priv->cdev.brightness_set_blocking = tps6105x_brightness_set;
61*b3b42b4aSSven Van Asbroeck priv->cdev.max_brightness = 7;
62*b3b42b4aSSven Van Asbroeck init_data.devicename = "tps6105x";
63*b3b42b4aSSven Van Asbroeck init_data.default_label = ":torch";
64*b3b42b4aSSven Van Asbroeck init_data.fwnode = priv->fwnode;
65*b3b42b4aSSven Van Asbroeck
66*b3b42b4aSSven Van Asbroeck ret = regmap_update_bits(tps6105x->regmap, TPS6105X_REG_0,
67*b3b42b4aSSven Van Asbroeck TPS6105X_REG0_MODE_MASK |
68*b3b42b4aSSven Van Asbroeck TPS6105X_REG0_TORCHC_MASK,
69*b3b42b4aSSven Van Asbroeck TPS6105X_REG0_MODE_TORCH <<
70*b3b42b4aSSven Van Asbroeck TPS6105X_REG0_MODE_SHIFT);
71*b3b42b4aSSven Van Asbroeck if (ret)
72*b3b42b4aSSven Van Asbroeck return ret;
73*b3b42b4aSSven Van Asbroeck
74*b3b42b4aSSven Van Asbroeck return devm_led_classdev_register_ext(&pdev->dev, &priv->cdev,
75*b3b42b4aSSven Van Asbroeck &init_data);
76*b3b42b4aSSven Van Asbroeck }
77*b3b42b4aSSven Van Asbroeck
78*b3b42b4aSSven Van Asbroeck static struct platform_driver led_driver = {
79*b3b42b4aSSven Van Asbroeck .probe = tps6105x_led_probe,
80*b3b42b4aSSven Van Asbroeck .driver = {
81*b3b42b4aSSven Van Asbroeck .name = "tps6105x-leds",
82*b3b42b4aSSven Van Asbroeck },
83*b3b42b4aSSven Van Asbroeck };
84*b3b42b4aSSven Van Asbroeck
85*b3b42b4aSSven Van Asbroeck module_platform_driver(led_driver);
86*b3b42b4aSSven Van Asbroeck
87*b3b42b4aSSven Van Asbroeck MODULE_DESCRIPTION("TPS6105x LED driver");
88*b3b42b4aSSven Van Asbroeck MODULE_AUTHOR("Sven Van Asbroeck <TheSven73@gmail.com>");
89*b3b42b4aSSven Van Asbroeck MODULE_LICENSE("GPL v2");
90